1. ~たいものだ / ~てほしいものだ (I really wish... / I truly want...)
Vて / Vないで + ほしいものだ
Meaning: ~たいものだ expresses a deep wish: “I really wish to... / I hope someday to...”. ~てほしいものだ expresses a strong hope that a person, organization, or situation will act/turn out in a certain way.
✓ The wish is often reflective, long-term, or heartfelt rather than an immediate request.
✓ It is therefore not normally used as a concrete command or direct request to the listener.
2. ~ものだ (Past recollection / Exclamation)
* Na-adjective だ -> な
A. Vたものだ — Past recollection: Nostalgically recalls an action, state, or habit that was repeated or characteristic in the past: “used to...”. It is not simply a way to narrate one isolated past event.
B. ~ものだ — Exclamation/reflection: Emphasizes surprise, admiration, emotion, or reflection: “how... / truly...”. Degree adverbs such as よく or ずいぶん may occur depending on the sentence.
✓ Distinguish this from the ~ものだ use for general truths/norms studied earlier.
3. ~ないもの(だろう)か (Isn’t there some way...? / If only...)
Meaning: ~ないもの(だろう)か expresses a wish to find some way to make a difficult situation possible: “isn’t there some way to... / if only...”.
✓ It often appears with potential forms or expressions such as どうにかして / なんとかして.
✓ It is not a genuine negative assertion; the whole construction is a rhetorical question expressing the speaker’s wish or concern.
4. ~ものがある (There is something... / It gives a strong sense of...)
* Na-adjective だ -> な
Meaning: ~ものがある means “there is something ... about it / it has a certain ... quality”. The speaker recognizes a notable quality, impression, or feeling in the situation.
✓ It commonly follows evaluative expressions such as つらい, 残念だ, 納得できない and gives a reflective evaluative nuance.
✓ It does not always mean an “extremely” strong emotion; intensity depends on the preceding expression and context.
5. ~ことだ (How...! / What a...!)
Vた + ことだ
Meaning: In this exclamatory/evaluative use, ~ことだ expresses the speaker’s feeling or judgment: “how... / what a... / truly...”.
✓ Common with adjectives and evaluative expressions such as ありがたいことだ, ひどいことだ, 困ったことだ.
✓ This is different from the advice pattern Vる / Vない + ことだ in Lesson 24; do not mechanically apply a rule that every verb must be in Vた form.
6. ~ことだろう / ~ことか (How...! / How much...!)
* Na-adjective だ -> な / Noun N だ -> な / である
Meaning: ~ことだろう / ~ことか is an exclamatory pattern emphasizing degree: “how...! / how many times...! / to what an extent...!”.
✓ It very often occurs with degree/quantity interrogatives such as どんなに, どれほど, 何度, 何回, どれだけ.
✓ It is not a question seeking an answer; the interrogative word emphasizes the great degree or amount.